The plunger type tips on the brass primers are what makes them so handy. I myself used one for over 15 years, and never had a problem; but...it only takes once , and I like my fingers! When it was pointed out to me that there was a potential problem, I switched to a small priming horn. Very thin walled. It seals tight, so now I don't have powder in the bottom of my bag. Another good thing. I have gotten away with a lot of semi-dangerous things in my 57+ years, but the older I get, the more I try to avoid useless risks. Most of the original brass powder containers/flasks that I have seen, aren't much heavier than a modern can that the powder comes in {GOEX}. Not much pressure containment capability, and that is good.